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| Aflevering | Eerste uitzending |
|---|---|
| S04E01 - Authorized Personnel Only (1) | 05/01/2005 |
| S04E02 - Authorized Personnel Only (2) | 05/01/2005 |
| S04E03 - The Awful Truth | 12/01/2005 |
| S04E04 - Ice | 19/01/2005 |
| S04E05 - Welcome to Liberty Village | 26/01/2005 |
| S04E06 - Nocturne | 09/02/2005 |
| S04E07 - Détente | 16/02/2005 |
| S04E08 - Echoes | 23/02/2005 |
| S04E09 - A Man of His Word | 02/03/2005 |
| S04E10 - The Index | 09/03/2005 |
| S04E11 - The Road Home | 16/03/2005 |
| S04E12 - The Orphan | 23/03/2005 |
| S04E13 - Tuesday | 30/03/2005 |
| S04E14 - Nightingale | 06/04/2005 |
| S04E15 - Pandora | 13/04/2005 |
| S04E16 - Another Mister Sloane | 20/04/2005 |
| S04E17 - A Clean Conscience | 27/04/2005 |
| S04E18 - Mirage | 04/05/2005 |
| S04E19 - In Dreams... | 11/05/2005 |
| S04E20 - The Descent | 18/05/2005 |
| S04E21 - Search and Rescue | 18/05/2005 |
| S04E22 - Before the Flood | 25/05/2005 |